code: def __contains__(self, val):
      return self is val or (
          type(val) is self.__class__ and val[: len(self)] == self
      )
  
file_path: catboost/contrib/python/Pygments/py3/pygments/token.py
label_desc: Use image node_id 3 for calling the _TokenType obj's underlying member method code with example usage: obj.__contains__(val) and returns: unknown